Gas-burner.



No. 705,862. Patehted July 29,1902.

S. A. POLITS KY' &. J. AGUST.

GAS BURNER.

(Application filed Nov. 2, 1901.) (No Modal.)

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SIMON A. POLITSKY AND JOSPH AGUST, OF BOSTON, MASSACHUSETTS.

GAS-BURNER.

SPECIFICATION forming part of Letters Patent No. 705,862, dated July 2:9, 1902. Application-filed November 2,1901. Serial No. 80,879. (No model.)

T to whom, it may concern.-

Be it known that we, SIMON A. Pomrsxv and J OSPH AGUST, of Boston, in the county of Suffolk and State of Massachusetts, have in,

The object of the invention is to obtain anl improved combustion, andthis object we attain by means of the novel construction and, arrangement of parts hereinafter describedand claimed.

Of the accompanying drawings, Figure 1 represents a vertical section of a gas-burner constructed in accordance with our invention. Fig. 2 represents a section on the line 2 2 of Fig. 1. Fig. 3 represents a section on the line 3 3 of Fig. 1. Fig. 4 represents a vertical section showing a modification. Fig. 5 represents a section on the line 5 5 of Fig. 4.

The same reference characters indicate the same parts in all the figures.

In the drawings, Figs. 1, 2, and 3, represents a mixing-tube having its walls expanded'near the lower end into a series of arms, between whichare'located apertures 11 11, forming anairdnlet, said tube screwing upon a nozzle or 'tip12, whichisadapted to screw upon the gas pipe or fixture andis' formed with a gas-discharge orifice 13, directed upwardly into the mixing-tube 10. The jet of gas discharged from the orifice'13 entrains air and mixes therewith in the usual manner in the mixing-tube.

14 is a tube slipped onto the mixing-tube 10 and having a burner-orifice at its upper end and near its lower end a series of apertures 16 16, forming an air-inlet and located between arms formed by expanding outwardly the walls of the tube, said arms alternating with the air inlets or apertures 16. The upper end of the mixing-tube 10 terminates short of the burner-orifice, and the portion of the interior of tube 14 between the upper discharge-orifice of the tube 10 and the burner-orifice 15 constitutes a mixing-chamher for the air and gas mixture issuing from the tube 10 and the additional air entering V through.the inlet-apertures l6 and passing up around the outside of the tube 10. The parts'are so proportioned that the air entering the mixing-tube 10 at the apertures 11 is hardly sufficient to maintain a complete combustion. The necessary air to complete the combustion is added to the initial mixture from the apertures 16. In this way we are enabled to bring all of the gas into more intimate mixture with a portion of the air by causing the air and. gas to pass in company through a relatively narrow channel and then to add a final amount'of air to this intimate mixture. Thus we are enabled to obtain a complete and economicalcombustion and to avoid striking back or back-burning of the flame. By providing the space between the inner and outer tubes we are enabled to obtain a strong secondary aspirator or injectoraction with the initial'mixture as a jet.

Figs. 4 and 5 represent a modification in which two mixing-tubes 10 10,havin g air-inlets 11 11 and gas-tips 12 12, contribute to a single secondary mixing-chamber located in the upper end of a single outer tube 14, surrounding the tubes 10 10, the said tube 14 having air inlet apertures 16 16. This latter is intended as a more powerful burner than the single burner hereinbefore described. An intimate mixture is assured for the larger gas-supply and the initial air-by performing the first Imixingin two tubes instead of a single tube. Our improved'burner canbe cheaply madeand is found very efficient and economical in service.

In Fig. 4, 17 represents in dotted outline a refractory mantle, and 18 represents a foraminous hollow conical cap attached to the upperend of the tube 14, its conical shape causing it to conform substantially to the outline of the mantle. This cap is preferably made of wire-gauze, though other material may be used, and its effect istocause' the illuminating mixture to issue in laterally directed small jets against the walls of themantle. This distributesthe-fiame more equally along the entire length of the mantle than has been the case when no such distributor is employed.

We claim 1. A gas-burner comprising an inner initial mixing-tube having an air-inlet and a discharge-orifice, a gas-discharge outlet directed into said tube in the vicinity of the air-inlet, and an outer secondary mixingtube surrounding the discharge-orifice of the first said tube and having a burner-orifice, said secondary tube having its lower end removably fitting the exterior of the inner tube above the air-inlet of the latter and having its walls above its lower end expanded and forming alternate arms and air-inlets.

2. A gas-burner comprising a plurality of inner initial mixing-tubes having air-inlets and discharge-orifices, gas-discharge outlets directed into said tubes in the vicinity of the air-inlets, and a single outer secondary mixing-tube surrounding the discharge-orifices of the first said tubes and having a burnerorifice, said secondary tube having its lower end removably fitting the exterior of the inner tubes above the air-inlet of the latter and having its walls above its lower end expanded and forming alternate arms and air-inlets.

In testimony whereof we have affixed our signatures in presence of two witnesses.

SIMON A. POLITSKY. v JOSPH AGUST.

\Vitnesses:

P. W; PEZZETTI, A. D. HARRISON. 

